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【单选题】固定式配电箱、开关箱的中心点与地面的垂直距离应大于（）小于（）米，移动式分配电箱、开关箱中心点与地面的垂直距离宜大于（）小于（）米。
A.
1.4,1.6；0.8,1.6
B.
0.8,1.6；1.4,1.6
C.
1.8,1.4；0.8,1.6
D.
0.8,1.4；0.8,1.6
【单选题】Subways are underground trains, which usually operate 24 hours a day. They are found in larger cities and usually run between the suburbs and the downtown area. Maps and schedules are available from t...
A.
within downtown areas
B.
away from city centers
C.
in or outside big modern cities
D.
between suburbs and city centers